Multistage pump with axial thrust optimization
AssigneeKSB SE & Co. KGaA
InventorsGoutam Sarkar, Kiran Jayantilal Oswal, Shruti Loveena Damodaran
Life of this patent
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Abstract
A multistage pump with axial thrust optimization is disclosed includes a pump discharge nozzle and a bypass system coupled to the pump discharge nozzle. The bypass system includes a throttle valve operatively coupled to the pump discharge nozzle, and a bypass line provided at the multistage pump. The bypass line is conducts flow from the throttle valve to a clearance gap of an axial thrust balancing arrangement. The throttle valve may be actuated to adjust a balancing flow through the bypass line such that pressure at the clearance gap is adjusted to increase and decrease fluid pressure at the clearance gap to balance axial thrust at different operating states of the multistage pump.
Claims11
A multistage pump with axial thrust adjustment, comprising:
- a pump discharge nozzle;
- and
- a bypass system coupled to the pump discharge nozzle, the bypass system including:
- a bypass line of the multistage pump, and
- a throttle valve operatively coupled to the pump discharge nozzle, the throttle valve being configured to adjust a balancing flow through the bypass line, and
- wherein
- a clearance gap provided for balancing axial thrust in the multistage pump is configured to receive the balancing flow through the bypass line,
- the throttle valve is actuatable to adjust fluid pressure in the clearance gap to control an amount of axial thrust balancing as a function of an operating state of the multistage pump, and
- the multi-stage pump is configured to operate the throttle valve in the bypass line in predetermined steps.
A multistage pump with axial thrust adjustment, comprising:
- a bypass system configured for axial thrust adjustment, the bypass system including:
- a throttle bush proximal to a clearance gap of an axial thrust balancing arrangement, the throttle bush including a bypass line,
- wherein
- the clearance gap is configured to receive a balancing flow through the bypass line to control an amount of axial thrust balancing as a function of an operating state of the multistage pump,
- the flow control device is configured to actuate at the predetermined pressure value, and
- the flow control device is configured to not actuate when the multistage pump is operated at a best efficiency flow rate such that there is no flow from an impeller side of the bypass system through the clearance gap.
Dependencies are inferred from the claim text.